Pinza

The data is from Racing Post entries and input into database.
Other data from newspapers input into d/b.
Top score relates to CD, C, DC and D, plus Newspaper "spot"( highest rating) horses and hints.
The top score is the highest figure of the combined information.
Sometimes the Next Best (NB) are considered if within 1 point of top figure.
Sometimes there are Joint top score (J) and occasionally joint next best (NBJ)
That is the basic method.
It's simplistic really and just a guide.

However the win rate of the selected could be better if other avenues are explored.

Comparing previous races at Track, Distance & Grade, in particular month, over last few years is best, but time consuming.

The ratings from other sources are useful for comparison and support.
"Theonlywayforward" provided his ratings and was quite  successful when top figures matched. "Grendel" is an AW expert and Southwell selections are worthy of a bet.

Using the RPR rating over the period from December 1st show that there have been 76 winners that were highest rated (361 races).

Comparing the Daily Express Spot there were 96 winners.